Some explanations

A solver is run under the control of another program named runsolver. runsolver is in charge of imposing the CPU time limit and the memory limit to the solver. It also monitors some information about the process. The trace of the execution of a solver is divided in four parts:
  1. LAUNCHER DATA
    These informations are related to the script which will launch the solver. The most important informations are the command line given to the solver, the md5sum of the different files and the dump of the /proc/cpuinfo and /proc/meminfo which provide some useful information on the computer.
  2. SOLVER DATA
    This is the output of the solver (stdout and stderr).
  3. WATCHER DATA
    This is the informations gathered by the runsolver program. It first prints the different limits. There's a first limit on CPU time set to 1200 seconds. After this time has ellapsed, runsolver sends a SIGTERM and 2 seconds later a SIGKILL to the solver. For safety, there's also another limit set to 1230 seconds which will send a SIGXPU to the solver. The last limit is on the virtual memory used by the process (900Mb).
    Every ten seconds, the runsolver process fetches the content of /proc/loadavg, /proc/pid/stat and /proc/pid/statm (see man proc) and prints it as raw data. This is only recorded in case we need to investigate the behaviour of a solver. The memory used by the solver (vsize) is also given every ten seconds.
    When the solver exits, runsolver prints some informations such as status and time. CPU usage is the ratio CPU Time/Real Time.
  4. VERIFIER DATA
    The output of the solver is piped to a verifier program which will search a value line "v " and, if found, will check that the given interpretation satisfies all constraints.

General information on the benchmark

Namenormalized-opb/mps-v2-20-10/ftp.netlib.org/lp/data/normalized-mps-v2-20-10-degen2.opb
MD5SUM2d6764e721075c7867e38358b7c5ac96
Bench Categoryoptimization, big integers (OPTBIGINT)
Has Objective FunctionYES
SatisfiableNO
(Un)Satisfiability was proved
Best value of the objective function
Optimality of the best value was proved
Number of terms in the objective function 14100
Biggest coefficient in the objective function 2553894928384
Number of bits for the biggest coefficient in the objective function 42
Sum of the numbers in the objective function 401268056673330
Number of bits of the sum of numbers in the objective function 49
Biggest number in a constraint 2553894928384
Number of bits of the biggest number in a constraint 42
Biggest sum of numbers in a constraint 401268056673330
Number of bits of the biggest sum of numbers49
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.137978
Number of variables16020
Total number of constraints444
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)0
Number of constraints which are nor clauses,nor cardinality constraints444
Minimum length of a constraint60
Maximum length of a constraint2550

Trace number 39796 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc2 THE 2005-06-07 20:49:26 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=27867 boxname=wulflinc2 idbench=823 idsolver=20 numberseed=0
MD5SUM SOLVER: f6aa7fb267fa9710116626be7e6d3048  /oldhome/oroussel/solvers/bsolo_lpr-v2
MD5SUM BENCH:  2d6764e721075c7867e38358b7c5ac96  /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-20-10-degen2.opb
REAL COMMAND:  bsolo_lpr-v2 /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-20-10-degen2.opb
IDLAUNCH: 27867
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.191
cache size	: 512 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips	: 888.83

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.191
cache size	: 512 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips	: 899.07

/proc/meminfo:
MemTotal:      1034660 kB
MemFree:        887472 kB
Buffers:         34124 kB
Cached:          89708 kB
SwapCached:       1492 kB
Active:          36276 kB
Inactive:        89772 kB
HighTotal:      131008 kB
HighFree:        63196 kB
LowTotal:       903652 kB
LowFree:        824276 kB
SwapTotal:     2097136 kB
SwapFree:      2094668 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           4996 kB
Slab:            15396 kB
Committed_AS:    71792 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1388 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-06-07 20:50:06 (client local time) WITH STATUS 20 IN 40.5378 SECONDS
stats: 27867 7 40.5378 20
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c INFO: OSL Context initialized.
c Initial problem consists of 16020 variables and 416 constraints.
s UNSATISFIABLE
c Exit Code: 20
c Total time: 40.509 s
#### END SOLVER DATA ####
#### BEGIN WATCHER DATA ####
Enforcing CPU limit (will send SIGTERM then SIGKILL): 1200 seconds
Enforcing CPUTime (will send SIGXCPU) limit: 1230 seconds
Enforcing VSIZE limit: 943718400 bytes
Enforcing Stack size limit: 67108864 bytes
Current StackSize limit: 67108864 bytes
Raw data (loadavg): 0.91 0.95 0.90 2/54 29955
Raw data (stat): 29955 (runsolver) R 29954 31399 31398 0 -1 64 8 0 0 0 0 0 0 0 19 0 1 0 896004240 884736 94 4294967295 134512640 135332820 3221224464 3221219644 135092226 0 2147483391 7 90112 0 0 0 17 0 0 0
Raw data (statm): 216 94 205 205 0 11 0
vsize: 864
[startup+10.0005 s]
Raw data (loadavg): 0.93 0.95 0.90 2/54 29955
Raw data (stat): 29955 (bsolo_lpr-v2) R 29954 31399 31398 0 -1 0 2420 0 0 0 992 6 0 0 25 0 1 0 896004240 22802432 2340 4294967295 134512640 134716908 3221224576 3221222804 1077414349 0 0 7 0 0 0 0 17 1 0 0
Raw data (statm): 5567 2340 1111 63 0 5504 0
vsize: 22268
[startup+20.0015 s]
Raw data (loadavg): 0.94 0.96 0.91 2/54 29955
Raw data (stat): 29955 (bsolo_lpr-v2) R 29954 31399 31398 0 -1 0 4750 0 0 0 1986 11 0 0 25 0 1 0 896004240 32432128 4670 4294967295 134512640 134716908 3221224576 3221222804 1077414420 0 0 7 0 0 0 0 17 1 0 0
Raw data (statm): 7918 4670 1111 63 0 7855 0
vsize: 31672
[startup+30.0011 s]
Raw data (loadavg): 0.95 0.96 0.91 2/54 29955
Raw data (stat): 29955 (bsolo_lpr-v2) R 29954 31399 31398 0 -1 0 8002 0 0 0 2981 17 0 0 25 0 1 0 896004240 45596672 7922 4294967295 134512640 134716908 3221224576 3221222852 1077414351 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 11132 7922 1111 63 0 11069 0
vsize: 44528
[startup+40.0006 s]
Raw data (loadavg): 0.95 0.96 0.91 2/54 29955
Raw data (stat): 29955 (bsolo_lpr-v2) R 29954 31399 31398 0 -1 0 9882 0 0 0 3973 23 0 0 25 0 1 0 896004240 53522432 9802 4294967295 134512640 134716908 3221224576 3221221340 1077196455 0 0 7 0 0 0 0 17 1 0 0
Raw data (statm): 13067 9802 1111 63 0 13004 0
vsize: 52268
[startup+40.5668 s]
Raw data (loadavg): 0.96 0.96 0.91 1/53 29955
Raw data (stat): 29955 (bsolo_lpr-v2) R 29954 31399 31398 0 -1 0 9882 0 0 0 3973 23 0 0 25 0 1 0 896004240 53522432 9802 4294967295 134512640 134716908 3221224576 3221221340 1077196455 0 0 7 0 0 0 0 17 1 0 0
Raw data (statm): 13067 9802 1111 63 0 13004 0
vsize: 0

Child status: 20
Real time (s): 40.5665
CPU time (s): 40.5378
CPU user time (s): 40.2469
CPU system time (s): 0.290955
CPU usage (%): 99.9294
Max. virtual memory (Kb): 52268
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####